define(['./_baseUniq'], function(baseUniq) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * This method is like `_.uniq` except that it accepts `comparator` which
   * is invoked to compare elements of `array`. The order of result values is
   * determined by the order they occur in the array.The comparator is invoked
   * with two arguments: (arrVal, othVal).
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Array
   * @param {Array} array The array to inspect.
   * @param {Function} [comparator] The comparator invoked per element.
   * @returns {Array} Returns the new duplicate free array.
   * @example
   *
   * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
   *
   * _.uniqWith(objects, _.isEqual);
   * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
   */
  function uniqWith(array, comparator) {
    comparator = typeof comparator == 'function' ? comparator : undefined;
    return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
  }

  return uniqWith;
});
